Compile INT and Variable

Hello,

I need your help.

I want to write something serial.
This also works over:

FirstSerial.write(0x30);

Now I would like, however, that the byte of the 0x3 and an INT variable composed.

How can I put this together the easiest?

Somehow like this:

A_One_minutes = 0x3 + one_minutes;

Unfortunately, I do not know how it works with INT.

Thanks in advance

Markus

What is an INT?

What are you trying to do?

Somehow like this

If you have a 7 and an 8, do you REALLY think that you'd make 78 by adding 7 and 8?